"TPS79501DRBR is a 500 mA low-dropout linear regulator (LDO) with an adjustable output (1.2 V to 5.5 V) and requires only a 1 µF ceramic capacitor for stable operation.

Key Parameters

• Output capability: 500 mA, adjustable output range 1.2 V ~ 5.5 V
• Dropout voltage: 110 mV typical at 500 mA
• PSRR: 50 dB at 10 kHz
• Output noise: 33 µV RMS (older version) or 78 µV RMS (newer version)
• Stabilization: Only a 1 µF ceramic capacitor required at the output
• Transient response: Fast load and line transient response
• Enable control: Built‑in EN pin for output shutdown
• Protection features: Overcurrent, overtemperature, reverse polarity, undervoltage lockout (UVLO)
• Package: 3 mm × 3 mm 8‑pin VSON (DRBR suffix)

Input Voltage Limitation
The maximum input voltage is 5.5 V, so it is only suitable for 5 V and lower power rails (e.g., 5 V → 3.3 V, 3.3 V → 1.8 V). It is not intended for 12 V or higher input voltage applications.

Alternative Recommendation
TI officially recommends the newer‑generation TPS7A90 (with better performance). If the existing design is already validated and meets requirements, this device remains a mature and viable option.

Application Scenarios

• Portable RF devices (wireless modules, GPS, Bluetooth): Leverages high PSRR and low noise to suppress power‑supply ripple interference with RF signals.
• Precision analog/mixed‑signal circuits (ADC, DAC, op‑amp supplies): Leverages low output noise (33 µV RMS) and fast transient response to ensure analog signal quality.
• Battery‑powered equipment: Leverages low dropout (110 mV) to extend battery life; the EN pin facilitates power management.
• PCB‑area‑sensitive designs: 3×3 mm VSON package and only a 1 µF ceramic capacitor at the output."